# EXT_TestScreenShot

## C Specification

  `#include <nitro/ext/scrntest.h>`
  `void EXT_TestScreenShot( u32 testFrames, u32 checkSum )`

## Description

For the number of frames specified, this function performs screen capture, calculates checksum from the capture data, and compares the calculated checksum to the expected checksum. If the test fails, the checksum value and an error message are output to the debug console.

## Internal Operation

`EXT_TestSetVRAMForScreenShot()` specifies the VRAM that will be used for capture. Calling `EXT_TestTickCounter()` increments frames.

## Arguments

`testFrames` | The number of frames to be tested.
`checkSum` | The expected checksum.

## Return Values

None

## See Also

`EXT_TestTickCounter, EXT_TestResetCounter, EXT_TestSetVRAMForScreenShot`

## Revision History

02/25/2004 Initial version